Update impress.js
Fixed typo from "how thing work" to "how things work"
diff --git a/js/impress.js b/js/impress.js
index 6d83a71..dedcefa 100644
--- a/js/impress.js
+++ b/js/impress.js
@@ -19,7 +19,7 @@
/*jshint bitwise:true, curly:true, eqeqeq:true, forin:true, latedef:true, newcap:true,
noarg:true, noempty:true, undef:true, strict:true, browser:true */
-// You are one of those who like to know how thing work inside?
+// You are one of those who like to know how things work inside?
// Let me show you the cogs that make impress.js run...
(function ( document, window ) {
'use strict';